F92 Series Air Volume Controls for Shallow Wells Product

F92 Series Air Volume Controls for Shallow Wells Product/Technical

Bulletin

The F92 Series Air Volume Controls for Shallow Wells

control the amount of air in the residential water

storage tanks of shallow well water systems. Shallow

wells are less than 7.6 m (25 ft) deep.

F92 Series Controls automatically maintain air volume

in the storage tanks of shallow well water systems by

allowing room air to enter into the air charging section

of the pump when the water level in the tank rises (loss

of air volume).

F92 Controls open the air valve on a rise in tank water

level to permit charging air into the storage tank with

pressures up to 552 kPa (80 psig).

Application

ater storage tanks in residential water systems rely on a volume of air in the tank to provide system pressure,

making it important to control the amount of air in the tank:

• Too little air in the tank results in rapid pump cycling - a problem common in shallow well systems

(less than 7.6

m [25

ft]

deep).

•

Too much air in the tank results in air entering the distribution system - a problem common in deep

well

system

s (more than 7.6 m [25 ft] deep).

For information on air volume controls for deep wells, refer to the F93 Series Air Volume Controls for Deep Wells

Product/Technical Bulletin (Part No. 24-7664-3000).

Figure 1: F92B Air Volume Control

for Shallow Wells

Table 1: Features and benefits

Features Benefits

Sturdy noryl (high performance thermoplastic) body Resists mechanical damage and corrosion.

Brass internal operating parts Minimize corrosion.

Pressure tested plastic float Provides long operating life.

Optional pressure gauge tapping Allows mounting of a pressure gauge.

IMPORTANT: Use this F92 Series Air Volume Controls for Shallow Wells only as an operating control. Where

failure or malfunction of the F92 Series Air Volume Controls could lead to personal injury or property damage to the

controlled equipment or other property, additional precautions must be designed into the control system.

Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended

to warn of or protect against failure or malfunction of the F92 Series Air Volume Controls.

F92 Series Air Volume Controls for Shallow Wells

Product/Technical Bulletin

Part No. 24-7664-2993, Rev. A

Issued October 2018

F92 Series Air Volume Controls for Shallow Wells Product/Technical Bulletin

Installation

The F92 Series Air Volume Control for Shallow Wells

connects to the air charging section of the pump. Install

the control in the tank as follows:

1. If you are using Teflon® thread sealing tape, wrap

the 1-1/4 in. NPT threads on the control. Overlap

the tape half its width to make two layers, and

continue to where the thread ends at the large end.

If you are using pipe sealant instead of Teflon tape,

apply a generous amount of sealant to the male

threads.

2. Use a wrench on the flat sides of the control body

to screw the control into a tank opening located

about 2/3 of the way up.

Note: The tank must have a diameter of at least

229 mm (9 in.) to allow room for the float to operate.

3. The F92B Control has a 1/4 in. tapped opening for

a pressure port at the top of the control. (The

F92A Control does not have a tapped opening.)

When you install a gage into this pressure port,

wrap two turns of Teflon thread sealing tape around

the male threads of the gage. Overlap the tape half

its width to make two layers. If you are using pipe

sealant instead of Teflon tape, apply a generous

amount of sealant to the male threads.

If you do not install a gage, install a standard

1/4 in. pipe plug in the opening. Wrap two turns of

Teflon thread sealing tape around the male threads

of the plug or gage. Overlap the tape half its width

to make two layers. If you are using pipe sealant

instead of Teflon tape, apply a generous amount of

sealant to the male threads.

Note: Do not overtighten. 6.8 N•m (5 lb·ft) of torque is

adequate to seal the threads.

4. When the F92 Control is installed, run 5 mm

(3/16 in.) tubing from the snifter valve on the pump

to the air valve on the control.

IMPORTANT: Use only Teflon® thread sealing tape

or pipe sealant that is compatible with plastic. Pipe

sealant meant for use with metal may corrode the

plastic body, causing it to crack.

IMPORTANT: Tighten (not overly tight) with the air

valve and assembly pointed down. Ensure that the

wrench does not slip and damage the air valve

casing assembly.

Figure 2: F92 Series Air Volume Control for Shallow Wells Dimensions, mm (in.)

IMPORTANT: Do not use the gage opening to

connect the pressure switch controlling the

operating pump. It must only be used for a pressure

gage because the opening can become plugged.

F92 Series Air Volume Controls for Shallow Wells Product/Technical Bulletin

Setup and adjustments

On initial startup, the level of water in the tank

increases. This raises the float until the air valve opens,

allowing room air to enter the charging section of the

pump and build up pressure in the tank.

The volume of air stabilizes after several cycles.

If the pump short-cycles after several days of

operation, the supply of air in the tank is insufficient.

Open the air inlet valve on the pump so that more air

can enter the system.

Air volume controls require no oiling or adjustments.

Checkout procedure

Before leaving the installation, observe at least three

complete operating cycles to be sure all components

are functioning correctly.

Troubleshooting

If water leaks from the valve body of the F92 Control,

remove the tubing from the control valve and determine

whether the water is coming up the tube from the pump

or from the control.

• If the water is coming from the pump, the

snifter valve on the pump is probably defective.

Replace the snifter valve.

• If water is leaking through the air volume

control, replace the control.

Figure 3: F92 Series Air Volume Control for Shallow Wells Application

Snifter Valve on Pump Suction Side

FIG:F92_applcn

Check Valve or Foot Valve

Room Air

To S yste m

Type F92B

Room

Air

To P ump

F92 Series Air Volume Controls for Shallow Wells Product/Technical Bulletin

® Johnson Controls and PENN are registered trademarks of Johnson Controls in the

United States of America and/or other countries. All other trademarks used herein are the property

www.penncontrols.com

Ordering information

To order, specify the complete product code number.

Repairs and replacement

Do not make field repairs. Repair parts are not available. If an F92 Series Air Volume Control for Shallow Wells

malfunctions, replace the control. Contact your nearest Johnson Controls®/PENN® distributor or sales

representative to purchase a replacement.

Technical specifications

Table 2: Selection chart for F92 Series Air Volume Controls for Shallow Wells

Product

code

number

Description

F92A-4C Air Volume Control for Shallow Wells, opens on pressure rise, barbed fitting on charger valve

F92B-1C Air Volume Control for Shallow Wells, opens on pressure rise, 1/4-18 PTF SAE short gage tap, 0.4 mm

(0.016 in.) valve orifice. Use this model in applications where excessive airflow may reduce water pumping

capacity.

F92B-2C Air Volume Control for Shallow Wells, opens on pressure rise, 1/4-18 PTF SAE short gage tap

F92 Series Air Volume Control for Shallow Wells

Body material 30% glass-filled Noryl thermoplastic

Float material Plastic with brass rod

Maximum tank pressure 552 kPa (80 psig)

Shipping weight Individual: 0.19 kg (0.42 lb)

Tank connector size 1-1/4 in. Male NPT

Air flow restrictor orifice F92B-1C Model: 0.4 mm (0.016 in.)

Snifter line connection Flare fitting for 5 mm (3/16 in.) tubing

The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these

specifications, consult Johnson Controls/PENN application engineering at 1-414-524-5535 or 1-800-275-5676. Johnson Controls shall not be